The engraving was in this order that the word 'Allah' was at the top...

The engraving was in this order that the word 'Allah' was at the top, 'Rasul' in the middle and 'Muhammad' at the bottom. This order and subtlety was resorted to prevent imitation and forgery. The reader was required to commence reading the signatures from the bottom till he reached the word 'Allah' (Muhammad Rasul Allah).

He did not content himself with even this and having stuck down the envelope of the letter with a special wax (instead of the 'lac' of the present times) affixed the seal on it.[^2] Conditions Of The World At The Time Of The Communication Of Universal Invitation In those days the power of the world was in the hands of two big empires and the…